Single-player games like Harold
Below are 8 single-player Steam games similar to Harold, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Harold page.
Ranked picks
- 1

Let's See What You Got
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
There's always room for improvement. Push your human tolerance to the limit with unique and challenging physic-sandbox platforming. Run on the walls. Jump off the ceilings. Swing through a dark lab. Die, a lot. The trials before you won't be easy. So, let's see what you got.
- 2

Great Marble Adventure
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
Guide the marble in the journey through more than 50 thematic stages across three difficulties: Easy, Normal, and Hard, with various challenges in Great Marble Adventure, an unforgettable 3D ball-rolling game! Are you ready for the unforgettable marble adventure?
- 3

Marble Abduction! Patti Hattu
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
Marble Abduction! is a brand new kind of rolling experience. Hand-crafted levels, intuitive and customizable controls, the highest visual quality and reliable and robust physics make for a truly out-of-this-world marbling experience!
- 4

iO
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
iO is an abstract physics platformer about size and speed. Grow bigger and smaller in order to solve some of the trickiest puzzles. Reach the exit as quickly as possible and grab a gold medal as your reward!
- 5

DEPLOYMENT
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
An intense competitive top-down shooter: choose your class, capture turrets, progress, and dominate in the arena. top-down shooter, multiplayer shooter, arena shooter, class-based shooter, sci-fi shooter
- 6

GROOVY
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
Groovy is a robotic sphere that exists in the abstract and crazy world of mechanisms. The game world is divided into two modes - Arcade and Survival, each of them filled with a unique environment, challenges and enemies.
- 7

SEUM: Speedrunners from Hell
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
Like a bastard child of Quake 3 and Super Meat Boy, SEUM: Speedrunners from Hell is truly hardcore and focuses on speed and fast reaction.
- 8

Action Henk
Single-player alternative to Harold — playable solo, no multiplayer required. Shares Action and Indie with Harold.
Run, jump and butt-slide into the glorious toy-filled world of Action Henk! Become a master of momentum and defy physics as you race against a band of ragged 90s action figures to once and for all prove that Action Henk is the fastest of them all!